Title:MAP READING - PART 4 - VISIBILITY [Main Title]
Film Number:DRA 947
Other titles:
Summary: Fourth in a series of ten Army Instructional films, showing how it is possible to calculate whether a given point is visible from another through use of contour lines. The film also discusses possible complicating factors, such as inaccurate or out of date maps and features such as trees, hedges or temporary structures and shallow contours, too insignificant to be marked.
